Clutch control mechanism



R. E; BOYDEN ET AL CLUTCH CONTROL MECHANISM Sept. 2, 1952 5 Sheets-Sheet1 Original F'iled Nov. 19, 1946 H m: .l n

.N Y RE am? MMD R w m IT T m .%A B 0 R BY EDWARDP Sept. 2, 1952 R. E.BOYDEN ET AL CLUTCH CONTROL MECHANISM Original iled Nov. 19, 1946 5Sheets-Sheet 2 MN 2 a v o M ATTORNEY Sept. 2, 1952 R. E. BOYDEN ET ALCLUTCH CONTROL MECHANISM Original Filed Nov. 19, 1946 5 Sheets-Sheet 3INVENTORS E. Bovauv BY X/ZZi ATTORNEY Sept. 2, I952 R. E. BOYDEN ET ALCLUTCH CONTROL MECHANISM 5 Sheets-Sheet 4 I Original; Fil'd Nov. 19,1946 ATTORNEY M WUHrH 5 Sheets-Sheet 5 INVENTORS immt. Bomew PWAPOATTORNEY Sept 1952 R E BOYDEN ET AL CLUTCH CONTROL MECHANISM OriginalFiled Nov. 19, 1946 Patented Sept. 2, 1952 CLUTCH CONTROL MECHANISMRobert E. Boyden, Los Angeles, and Edward P. Drake, Glendale, Calif.,assignors to Clary Multiplier Corporation, Los Angeles, Calif., acorporation of California Original application November 19, 1946, SerialNo.

Divided and this application March 28, 1949, Serial N0. 83,904

12 Claims. 1

This invention relates to motor driven calculating machines and hasparticular reference to means for controlling a plurality of clutchoperated mechanisms of such a machine in difierent manners in order toperform different, types of operations.

The present application is a division of our copending application,Serial No. 710,880, filed November 19, 1946, which has since maturedinto Patent Number 2,515,692, issued on I July 18, 1950, to whichapplication reference is had for a complete disclosure of a calculatingmachine in which the present invention is embodied. It is to beunderstood however, that the invention may equally well be applied toother forms of calculating machines embodying a plurality of clutchoperated mechanisms.

On object of the present invention is to provide a pair of cyclicallyoperable clutch operated mechanisms, operation of one of which iscontrolled by operation of the other and vice versa.

Another object is to provide a clutch control for a pair of cyclicallyoperable clutch operated mechanisms wherein one clutch is operablethrough a complete cycle to perform one type of operation and whereinthe clutches are operable through interspersed cyclic phases to performanother type of operation.

The manner in which the above and other objects of the invention areaccomplished will be readily understood on reference to the followingspecification when read in conjunction with the accompanying drawingswherein:

Fig. 1 is a longitudinal sectional view through a machine embodying apreferred form of the present invention.

Fig. 2 is a side elevation showing the mechanism for driving the mainracksand for controlling the multiplier digit selecting mechanism.

Fig. 3 is a side elevation illustrating part of the controls for themain and multiplier clutches and the motor drive therefor.

Fig; 4 is a side elevation illustrating further controls for the mainand multiplier clutches.

Fig. 5 is a side elevation illustrating part of the machine controlsincluding the add and multiplication control bars.

Fig. 6 is a front view of the multiplier digit selection control plate.jj 7 Since the machine in which the present invention isembodied in itspreferred form is disclosed in detail in our aforementioned applicationonly a brief description of the operation of the same will be mentionedherein and for the sake of brevity only that mechanism which embodiesthe present invention or cooperates therewith will be described indetail.

The machine is of the reciprocating rack type comprising a plurality ofordinally spaced difierentially operable racks, one of which is shown at35 (Fig. 1). Each rack is supported for fore and aft movement at therear by a cross-shaft embraced by an open slot 96 formed in the rack. Atits forward end, each rack is supported by a rack drive shaft 91suitably guided for fore and aft movement in slots one of which is shownat hi2 (Fig. 2) formed in machine side frames I43. The shaft 91 extendsthrough and is movable along slots 98 formed in the various racks.

For the purpose of differentially controlling the extent of travel ofthe racks, there is provided in operative relation to each rack a seriesof keys 43, forming part of a keyboard. Each key 43 is depressible intoa set position wherein a keystem 4 la thereof is positioned to beengaged by a shoulder H]! of a rack stop bar I00, which, for the purposeof the present disclosure, may be considered as attached to itsrespective rack in the position illustrated.

The racks 35 are arranged to enter amounts into or total amounts out ofaccumulators, one of which is generally indicated at 35. The controlsand construction of these accumulators are disclosed'in ouraforementioned application and the construction is disclosed and claimedin the application of E. P. Drake, Serial No. 582,554, filed March 13,1945, which has since matured into Patent No. 2,472,696, issued on 'June7, 1949. The accumulator 36 comprises a plurality of ordinally arrangedaccumulator gears I60 rotatably mounted on a shaft [6! which may beraised or lowered to selectively mesh the gears [60 with either upperrack gear sections IE3 or lower rack gear sections [62 of the racks 35in accordance with the type of problem to be performed. That is, duringan operation in which amounts are to be additively added into theaccumulator, the latter is lowered to mesh the gears I50 with the rackgear sections I62 in advance of the forward movement of the rackswhereby the gears will be rotated in a clockwise direction. During asubtractive or totalling operation, the [accumulator is raised to meshthe gears with the upper rack sections 163 in advance of forwardmovement of the racks 35 so that the racks will rotate the gears in acounter-clockwise direction.

Power for the various mechanisms of the .machine is obtained through-acyclically operable main clutch I (Fig. 3) and a cyclically operablemultiplier clutch 9, which clutches are controlled by various ones ofdepressible control bars (to be described later) and by each other. Theclutches are driven by a motor 420 having a worm 42I on the motor shaftthereof which meshes with a worm gear 422 rotatably mounted on a crossshaft 423 and suitably fixed to a spur gear 424. The latter gear mesheswith a main clutch driving gear 425, rotatably mounted on a main shaft8, and a multiplier clutch driving gear 426, rotatably mounted on amultiplier shaft I0.

Means are provided for yieldably transmitting a drive from the mainshaft 8 (Figs. 2 and 3), when the latter shaft is operated by the mainclutch I, to the racks 35. Referring to Fig. 2, a pair of complementaryrack drive cams I and I3I are keyed to the aforementioned shaft 8. Thesecams are engaged by rollers I32 and I33 of a cam follower I34 pivoted atH6 and connected by a link I35 to an arm I36 fastened on a rockableshaft I31. Also secured to the shaft I31 arespaced arms I38 connected bylinks I46 to the aforementioned rack drive shaft 91, wherebyrto transmitfore and aft movementto th latter shaft. v

The slot 98 in each of the drive racks 35 (Fig. 1) terminates at itsrear in opposed laterally disposed notches I45. Each of these notches isnormally engaged by a roller, I46 carried on a carrier I4! pivoted onthe shaft 91. The two carriers [41 associated with any one rack arespring urged in opposite directions by a tension spring I48extendingtherebetween to yieldably maintain the rollers I46 inengagement in the notches I45 to ther'e'b'y' form a yieldable connectionbetween the drive shaft and each of the different drive racks 35.

In the operation of the machine to perform an additive entry of a factorinto the accumulator 36, the factor is set into the keyboard and an addbar I5 (Fig. 5) is depressed, causing operation of the machine andengagement of the main clutch I (Fig. 3) to operate through a completecycle. Means (not shown) are also provided under control of the add barI5 to cause the accumulator 36 to mesh with the lower rack gear sectionI62 of rack 35.

Referring to Fig. 5, the stem of the addbar is provided with a verticalslot guided over a framepin 453. The lower end of the stem is pivotallyconnected to a bellcrank 454, pivoted at 455, and urgedcounter-clockwise by a spring 456 to normally hold the add bar in itsillustrated raised position. Apin 46M on the lower arm of the bellcrank454 extends within a notch in a clutch control bar 46I I. The latter issupported for lengthwise movement by swinging arms 463I and 46M, thelatter being fastened to a rockable shaft 465I to which is also fasteneda similar arm 4'66I connectedto the forward end of a second clutchcontrol bar 46'. I Referring to Fig. 3, the link 46' is provided with anotch 468I normally embracing an ear 413 on a clutch control lever 433.The latter is pivoted at 4' and isurged clockwise into engagement with afull cycle shoulder 432 of the main clutch by a spring 4I2t'o normallyhold the clutch in disengaged condition. However, upon 'depression ofthe add bar I5 and consequent forward movement of the bars 46H and46II,the control lever 433 will be rocked counter-clockwise out of engagementwith the shoulder 432 to cause engagement of the main clutch. V p

the main clutch advances through its first 180 of rotation, an ear 496on a camming memher 49L secured to the main shaft 8, moves intoengagement with a shoulder 489 located at the rear end of the clutchcontrol bar 46', rocking the same upward out of engagement with the ear4l6 on the clutch lever433 so that the latter can move against theperiphery of the clutch under the action of its spring 412.

Although the clutch lever 433 is capable of arresting operation of themain clutch l at the end of the first phase thereof or at approximately180 of rotation by engaging a second shoulder 432a thereon, it isprevented from doing so during addition operations. For this purpose, acamming lever 492 (Figs. 3 and 4) is also pivoted at 4'II independentlyof the clutch lever 433 and is normally held in its illustrated positionby a spring 493. A slot 494 is formed in the lever 492 to guide a pin495 carried on a link 496 into either of two positions therealong. Thelatter is pivotally supported at its forward end by a bellcrank 43!(Fig. 5) pivoted at 498 and normally held in a counter-clockwiseillustrated position by a spring 439 so as to maintain the pin 495 inits rearmost illustrated position along the slot 494. During addition,the position of the link 436 is unaltered, thereby holding the pin 495over a tail 433a of the clutch control lever 433.

Toward the mid-cycle or first phase of the main clutch, camming member4! keyed'onthe main shaft 6 carries an ear 50I thereof against a cammingedge 532 on the lever 492, thereby rocking the latter counter-clockwiseto force the pin 495 to likewise rock the clutch control lever 433.Thus, the latter will be rocked outward away from the clutch I torelocate its ear 479 in the notch 468I of the clutch control bar 46Hjust as the shoulder 432a of the latter passes its mid-cycle position sothat the control lever 433 will be ineffective to arrest the clutch atthis point. Therefore, the clutch will continue through the second halfof its cycle and during that time an car 563 on member 49I againdisengages the clutch control bar 46' from the clutch control lever 433.Therefore, at the end of the cycle the lever 433 will engage the fullcycle shoulder 432 of the clutch to disengage the same.

As disclosed in detail in our aforementioned application, multiplicationis accomplished in the present machine by first entering the multiplicand into the keyboard and depressing a first factor entry bar I3(Fig. 5). The latter, upon depression, is effectiv-eto actuate theclutch control bar 46II in the same manner as the add bar I5, That is,the bar I3 is connected to a bellcrank 668 pivoted at 616 and providedwith a pin 6' extending into a notch formed in the clutch control bar46I I.

The bar I3 is also effective through means, not shown, to cause a shaftI62 (Fig. l), carrying gears I03 which mesh with vertically movableracks 40, to move downwardly along the racks 43 to an alternate position162a wherein the gears I03 mesh with idlers 166. The latter idlers, inturn, are in continual mesh with rack gear sections I05 formed on theracks 35 and when the gears I03 are thus meshed with both the racks 40and idlers I66 the gear assembly will transmit motion between the racks35 and the racks 40. Therefore, during subsequent advance movemento'f-the racks 35, the racks 49 will be vertically advanced to positionsindicative of the multiplicand factor and will control themultiplication unit (not shown) accordingly.

The multiplier is thereafter entered into the vmachine by setting thisfactor into the keyboard anddepressing a second factor bar I4. Thelatter will initiate operation of the main. clutch and will conditionthe same to become disengaged factor. At the completion of themultiplication, .the multiplier clutch will become disengaged and willeffect reengagement of the main clutch I to complete its second phase of180 of rotation so as to return to its illustrated full-cycle position.

. Referring to Fig. 5, depression of. the bar I4 will rock bellcrank 491about its pivot 498 against the action of spring 499 to draw theaforementioned link 496 (see also Fig. 4). forward so as to move the pin495 thereon "into a forward position wherein it overlies the bellcrankIII (see also Fig. 3). Thus, the pin will be ineffective to rock thelever 492 to remove the clutch lever 433 from the periphery of theclutch toward the end of the first 180 of rotation and, consequently,the main clutch will become automatically disengaged at that time. Thebellcrank 1 II is pivoted at 4' independently of the levers 433 and 492and is urged clockwise into its illustrated position by a spring H8. Thebar I4 is held depressed, through means not shown, throughout themultiplication operation and therefore the pin 495 will be retained overthe tail of bellcrank I I 1 until the end of such operation.

- It will be noted on reference to Fig. 5 that the pivot pin I20,connecting the link 496 to the bellcrank 491, extends into a notch inthe clutch control bar 46 so that, as the second factor bar I4 isdepressed, this pin will draw the clutch control bar forward to causeengagement of the main clutch in the same manner as described inconnectionwith the add and first factor entry operations.

Operation of the main clutch, through the rack drive means hereinbeforedescribed, causes the racks to differentially advance to positionscontrolled by depressed ones of the various amount keys 43 so as tomechanically represent thevalue of the multiplier factor set up in thekeyboard.

Toward the end of the first 180 of operation of the main clutch, the ear50I (Fig. 4) of member 49I will'cam the lever 492 counter-clockwise,causing the pin 495, which is now located over the-tail of bellcrankIII, to likewise rock the latter. The bellcrank is connected through alink I2I (Fig. 3) to a multiplier clutch control lever I23, similar inconstruction and function to the lever 433. Thus the lever 123 will berocked counter-clockwise against the action of its spring I25 to causeengagement of the multiplier clutch 9. It is to be noted that at thistime the racks 35, or at least those that have been advanced, will beleft in their advanced positions and will remain therein until the endof the multiplication operation.

A lever I26, similar to lever 492, is pivoted at I24 and is urgedclockwise by a spring I36. This lever is provided with an elongated slotwhich guides a pin 12! carried by a link I28 pivotally connected at itsforward end to a bellcrank I29. The bellcrank is fulcrumed at I3I andnormally held in its illustrated position by a spring I32 to therebyhold pin 121 in the rear portion of this slot wherein it overlies a tailformed on the clutch control lever I23.

Keyed on the multiplier shaft I0 is-a member moves past the tip of leverI26.

I33 having an ear I34 thereon. The latter is effective to .cam the leverI26 counter-clockwise just'prior to the end of a multiplier clutchcycle. thereby causing the pin I2I tohold the clutch control lever I23away from the peripheryof the clutch as afull cycle indentation 9atherein Consequently the clutch will continue through a new cycle.

The above re-cycling of the multiplier clutch will continue until themultiplicand has been multiplied by each significant digit of themultiplier at which time the bellcrank I29 is rocked counter-clockwise(as will be described hereinafter) to position the pin 12! in theforward end of the slot in the lever I26 and in a position overlying thetail of the bellcrank I35. The latter is normally held in the positionshown by a spring I36 and is connected by a link I38 to a bail I40pivoted at 411. As the multiplier clutch approaches the end of its finalcycle, with the pin 121 located in its forward position, the cammingmember I33 on shaft ID will again rock the lever I26 counter-clockwisebut since the clutch control lever I23 is now permitted to engage thefull cycle indentation 9a of clutch 9, the latter will becomeautomatically disengaged. On the other hand, the bellcrank I35 will berocked by the pin I21, forcing a bent-over projection 138a on the link138 to engage the ear 410 (see also Fig. 3) of the main clutch controllever 433 to reengage the latter clutch so thatit will complete itssecond phase or of operation.

As previously described, multiplication is performed by successivelymultiplying all digits of the multiplicand by the successive significantdigits of the multiplier, i e., by one multiplier digit at a time.Consequently means are provided for sequentially causing successivelyhigher denominational ones of the racks 35 to control the multiplicationprocess. For this purpose the latter means is arranged to control themultiplication unit which is not completely disclosed herein. Suffice itto say, however, that the multiplication unit 5 is formed of a pluralityof plates I44 held together as a unit by transversely extending rods I45and I46. The latter are guided for fore and aft movement in guideslotsI41 and I48, respectively, formed in the machine side frames I43.

Means are provided for sequentially. sensing the various racks 35 whichhave been advanced to represent multiplier digits and to maintain themultiplier clutch in engagement until multiplication by all significantdigits of the multiplier has been completed. As shown in Figs. 1 and 6,a vertically shiftable control plate 154 extends across the machine andis mounted on rollers I55 on on side and I56 on the other, said rollersbeing guided in vertical slots I5II formed in the machine side framesI43.

The plate I54 is guided vertically in parallel ,movement by yoked armsI51 (Fig. 5), and I58 (Fig. 2), which arms embrace the upper ones of therollers I55 and I56, respectively. The arms are secured to a rockableshaft I60 to which is also secured an arm I6I urged clockwise by springI62 to yieldably force the control plate I54 downwardly.

Two separate devices are provided to normally hold the plate I54 in itsraised position illustrated in the drawings in all operations exceptmultiplication. As shown in Fig. 2, a yoked arm I63 is pivoted to onearm of th cam follower I34 and embraces a roller I64 on the arm I6 I.When the main clutch and its shaft 8 are in full cycle 'bellcrank 491 bya link 110. ma'lly-efiective to latch a pin 168 on the-arm 151 position,the cam 'follower .l34, controlled by oams I30 and I31,Will;cause.arm'163 to maintain the .plate 1.54init raised position, butduring a :main cycle the cam followerrocks counter-clock- :wiselllOViIlg the arm 1-63 to its 'dot-and-dash line position 153a.Itwill'berecalled that durin multiplication, the main shaft 8 will beheld in a half-cycle position and 'the cam 'followerfli will thereforeallow the plate 154 to move-downward if'not otherwise restrained.

A second device-is provided to normally prevent downward movement of theplate 154. As shown in-Fig. 5, a-latch 165 is pivoted at 'HiB-andisconnected to "the second factor keyoperated The latch is norasillustrated.

"Upon depression of the second factorbar [4, the link 1111 will bedrawn'forwardly to cause the latch165 to release-the arm 151, permittingthe 'plate 154 to move downwardly whenthe main shaft S-is rotatedsufiiciently.

Referring to Fig. 6, it will be noted that the "plate 154 is providedwith a series'of Ordinally arranged L-shaped notches 114 arranged in--echeln and progressing upwardly from-the right hand order. The path ofmovement ofthe vertical leg of each notch is located in alignment withthe nose '115 of arr-advance sensing lever '116 (Fig.1),'pivoted-at'1-11 and urgedcounterthe side of the control plate 154 orto enter an aligned one of the notches 114. It will be noted that onlyone set of levers 116 and 180 will be. 1

effective to latch the control plate at any one time.

Means are provided for preventing a pair 'of levers 116 and 180 fromblocking downward movement of the plate 154 when the associated rack islocated in its'zero position. An ear 19-1 on each rack is arranged tounderlie a nose 190 on the associated lever 180 when the rack is locatedin its illustrated zero position. Thus, if a rack-35 is not advancedfrom its zero position its associated selecting lever 18!] will be heldoutward against the action of its spring and the latter, in turn, willhold the associated sensing lever 116 outward by virtue of an ear 192thereon overlying the lever 180. In this condition, the notch '114 .inplate 154 aligned with said levers 1-16 and 180 will not be engaged andheld. Therefore the plate 154 willbe permitted to move downward untilanother notch therein willbe-engaged by a pair of levers 11$ and 189 mehigher denominational order.

Theplate 154, in conjunction with the pairs of levers 116 and 180, formsthe means for sequentially causing the different racks 35 to control themultiplication operation. For this purpose, the levers 116 and 180 areprovided withpear-shaped slots 193 and 194, respectively, thereinthrough both of which (in each order) extends a p'in'195 mounted on thelower end of a camlin'k 196. The upper end of the link carries a cammingpin 191 .Which'is .slidable along a verticalguide :slot

'198fin the associated plate 144 of theaforementioned carriage 5. Also,the pin 191 extends into a triangular camming aperturerBOfl initheassociated rack 35.

The pin 195. at the-lower end of each'zlink 198 alsov extends through.anzarcuate slot 801 formed in a juxtaposed lever 802 which is securelyfastened to 'a rockable shaft .803, there being-a lever 802 ineachxorder of the machine. The slot 8M is provided witha shoulder 804toward which the pin195 is urged .by a spring 805. The spring 305 alsonormally maintains the link 19.6 in 'its illustrated raised'position..Howeventhe'slot 194 in the lever 18,0 normally prevents the pin 195from moving to a position under the. shoulder .804 unless the twoassociated levers 116 and .180 are allowed to rock into their blockingpositions relative to the plate 154. I

The shaft 803 and arms 802 secured thereto are oscillated onceduring'each-multiplying cycle. Therefore, when any set of levers 116 andhas moved into blocking relation with the plate 154, the associated pinwill have been positioned by its spring 805 below the shoulder "804 ofthe'associated lever 802 and during the ensuing oscillation of the shaft803, the link 196 will be drawn downwardly causing the pin 191 to camalong the engaging surface of the triangular aperture 800, therebymoving the carriage -5 lengthwise to a position corresponding "to'that'of the associated rack 35.

Toward the end of the downward stroke ofthe lever802 which is driving anassociated link 196,

the pm 195 of the link will cam along the forward edges of one or bothor slots 193 and 194 in the associated levers 1-16 ,and'180,respectively, drawing the latter levers out of-blocking relation tothegplate 154 so that the latter will be free .to

move downward until blocked by the levers of the periphery pf a cam P816bymeansof'a'spring 814. The cam BIG is carried by the multiplier shaft10 and is therefore effective to oscillate -the1shaft 803 onceduring'eachzmultiplying cycle.

lt will be seen'fromthe foregoing that the plate 354 will progressdownwardlyas the multiplication operation-ensues and will progressivelyadvance the shaft 166 accordingly in a-clockwise direction. -Attachedtothe latter shaft is an-arm 153E -'(-l5 i g. 4) which,' when the plate154 moves intodts lowermost position,-wi'l1 engage the aforementioned-bellcrank 129, rocking the same counter-clockwise"topositionthe link128 and'pin 121 thereon,-in-a'forerardpositionwhich, as describedhereinbeforawill' effect termination, of operation 'ofthemultiplierclutch 9 at'the-end-of'the current cycle and will causereengagement of the main clutch to complete its secondph'ase ofoperation to return the racks from their advanced positions.

Having thus described the-invention, what '-'we desire *tosecure-byUnited States Patent is:

1. In acalculating machine having calculating mechanism including aplurality ofindependently operable devicesjand drive means therefor; the

combination of a first cyclic clutoh between-said of each of saidphases, means for initiating operation of said clutch, a second cyclicclutchbetween said drive means and another of said devices, meansoperable by said first clutch durin a first one of said phases thereoffor causing initiation of operation of said second clutch, meansoperable by said second clutch for initiating operation of said firstclutch through the second phase thereof, and selectively settable meansfor disabling said initiating means for said second clutch and forrendering said arresting means ineffective to arrest said first clutchat the completion of the first of said phases. r l

2. In a calculating machine having calculating mechanism including aplurality of independently operable devicesand drive means therefor; thecombination of a first cyclic clutch between said drive means and one ofsaid devices, said clutch being operable through two 1 successivephases, means for arresting said clutch at the completion of I each ofsaid phases, means for initiating operation of said clutch, a secondcyclic clutch between said drive means and anotherof said devices, meansselectively settable into either of two conditions and operable by saidfirst clutch, said selectively settable means being effective in one ofsaid conditions thereof to cause initiation of operation of said secondclutch and effective in the other of said conditions to render saidarresting means inoperative to arrest said first clutch at thecompletion of the first of said phases.

3. In a calculating machine having calculating mechanismincluding aplurality of independently operable mechanisms; and drive meanstherefor; the combination of a first cyclic clutch between said drivemeans and one of said mechanisms, said clutch being operable through twosuccessive phases, means including a clutch control member forinitiating and terminating operation of said clutch, spring means foractuating said clutch control member to terminate operation of saidclutch after either of said phases thereof, a second cyclic clutchbetween said drive means and another of said mechanisms, a device forinitiating operation of said second clutch, actuating means operable bysaid first cyclic clutch, and selectively settable means operable bysaid actuating means and effective in one condition thereof to'permitoperation of said spring means and to cause operation of said initiatingdevice for said second clutch, said selectively settable means beingeffective in another condition thereof to prevent said operation of saidspring means.

4. In a calculating machine having calculating mechanism including aplurality of independently operable devices; and a motor therefor; thecombination of means including a first cyclic clutch between said motorand one of said devices, said clutch being operable through twosuccessive phases, means including a depressible key for initiatingoperation of said'clutch, means including a second cyclic clutch betweensaid motor and another of said devices, means controlled by said firstclutch during a first one of said phases thereof for causing initiationof operation of said second clutch, means operable by said second clutchduring any predetermined one of a number of cycles thereof forinitiating operation of said first clutch through the second phasethereof, and means including a second depressible key for initiatingoperationof said first clutch and for rendering said second clutchinitiating means ineffective and for causing said first clutch to effectoperation of said first initiating means during said first phasethereof.

5. In a calculating machine having calculating mechanism including aplurality of independently operable devices; and a motor therefor; thecombination of means including a first cyclic clutch between said motorand one of said devices, said clutch being operable through twosuccessive phases, means for initiating operation of said clutch, meansincluding a second cyclic clutch between said motor and another of saiddevices, means controlled by said first clutch during a first one ofsaid phases thereof for causing initiation of operation of said secondclutch, means controlled by said second clutch during any predeterminedone of a number of cycles thereof for initiating operation of said firstclutch through the second phase thereof, and a second means forinitiating operation of said first clutch and for rendering said secondclutch initiating means ineffective and for causing said first clutch toeffect operation of said first initiating means during said first phasethereof.

6. In a calculating machine having calculating mechanism including aplurality of independently operable devices; and a motor therefor; thecombination of means including a first cyclic clutch between said motorand one of said devices, said clutch being operable through twosuccessive phases, means for arresting said clutch at the completion ofeach of said phases, means including a depressible key for initiatingoperation of said clutch, means including a second cyclic clutch betweensaid motor and another of said devices, means controlled by said firstclutch during a first one of said phases thereof for causing initiationof operation of said second clutch, means for arresting said secondclutch at the completion of a cycle thereof, means for selectivelyrendering said last mentioned arresting means effective or ineffective,means controlled by said last mentioned means upon rendering saidarresting means effective,

for initiating operation of said first clutch through the second phasethereof, and means including a second depressible key for initiatingoperation of said first clutch and for rendering said second clutchinitiating means ineffective and for rendering said arresting means forsaid first clutch ineffective at the completion of said first phasethereof.

' 7. In a calculating machine having calculating mechanism including aplurality of independently operable devices; and drive means therefor;the combination of a first cyclic clutch between said drive means andone of said devices, said clutch being operable through two successivephases, a control member for said clutch movable to clutch engaging anddisengaging positions, spring means for normally moving said controlmember to clutch disengaging position to disengage said clutch at theend of each of said phases thereof, a second cyclic clutch between saiddrive means and another of said devices, a second control member forsaid second clutch, a device operable by said first clutch including aninterponent settable into one positionwherein said interponent iscapable of moving said first mentioned control member to clutch engagingposition before the end of a first-phase thereof whereby to enable saidfirst clutch to continue uninterrupted through two phases thereof, saidinterponent being settable into a second position wherein saidinterponent is capable of moving said second control member to clutchengaging position and incapable of moving said first mentioned controlmember to clutch engaging position.

8. In a calculating machine having calculating mechanism including aplurality of independently operable devices; and drive means therefor,the combination of a first cyclic clutch between said drivemeans and oneof said devices, said clutch being operable through-two successivephases, a control member for said clutch movable to clutch engaging anddisengaging positions, means for normally moving said clutch controlmember to clutch disengaging position to disengage said clutch at theend of each of said phases thereof, a second cyclic clutch between saiddrive means and another of said devices, a second control member forsaid second clutch, means for moving-said-second control member toclutch engaging and disengaging positions, -a device operable by saidfirst clutch including an interponent settable into one position whereinsaid interponent is capable of moving said first mentioned controlmember to clutch engaging position before the .end of a first phasethereof whereby to .cause said first clutch to continue uninterruptedthrough said two phases thereof, said interponent being settable into asecond position wherein said interponent is capable of moving saidsecondcontrol member toclutch engaging position.

9. (Ina calculating machine having calculating mechanism including aplurality of independently operable devices; and drive means therefor,the combination of, a first cyclic clutch between said drive means andone of said devices, said clutch being operable through successive.phases, a control member for engaging and disengaging said clutch,meansfor normally causing said control memberto disengage said clutch atthe end of eachof said phases thereof, a second cyclic clutch between.said drive means and another of said devices, a second control memberfor engaging and disengaging .sa-idseccnd clutch, a device operablebysaid first clutch during one of saidphases thereof including aninterponent settable into one position whereinsaid interponent iscapable of rendering said means inefiective, said interponent beingsettable into a second. position wherein said interponent is capable ofcausing said second control memberto engage said second clutch.

10. In a calculating machine having calculating mechanism including aplurality of independently operable devices; and drive means therefor,the combination of .a first cyclic clutch between said drive means andone of said devices, said clutch being operable through successivephases, a control member for engaging and disengaging said clutch, meansfor normally causing said control member to disengage said clutchat theend of each of said phases thereof, -a second cyclic clutch between saiddrive means and another of said devices, a second control member forengaging and disengaging said second clutch, a device operable by saidfirst clutch during one of said phases thereof including aninterponentsettable into one position wherein said interponent is capable ofrendering said meansineffective, said interponent being settable into asecondposition wherein said interponent is-capable of causing saidsecond control member to engage said second clutch, and means operableby said secondclutch duringany predetermined one of .a number of cyclesthereof for causing said first mentioned control member to re-engagesaid first clutch.

11. In a calculating machine having calculating mechanism including aplurality of independently operable devices; and drive means therefor,the combination of a first cyclic clutch between saiddrive means and oneof said devices,

.said clutch being operable through successive phases, a control memberfor engaging anddisengaging said clutch,'means for normally causing saidcontrol member to disengage said clutch 'at the end of each of saidphases thereof, a second cyclic clutch between said drive'means andanother of said devices, a second control member for engaging anddisengaging said second clutch,

a device operable by said first clutch during one of said phases thereofincluding an'interponent settable into one position wherein saidinterponent iscapable of rendering said means ineffective, saidinterponent being settable into a secondposition-wherein saidinterponent is capable of causing'said second control member-toengagesaid second clutch,,means operable bysaid second clutch during anypredetermined one of a number of cycles thereof for causing said firstmentioned control member to engage said first clutch, spring means fornormally maintaining said interponent in tone of said positions, meanscomprising a depressible key for causing said first mentioned controlmember to engage said'first clutch, and means comprising a seconddepressiblekeyifor causing said first mentioned control member to engagesaid first clutch and for 'moving said interponent to the other ofsaid-positions.

12. In a calculating machine having calculating -mechanism including aplurality of independently operable'devices; and a motor therefor; thecombination of means including a first cyclic .clutch between said motorand one of said .devices, said clutch being operable through ;twosuccessive phases; a clutch control element movable 'to cause engagementand disengagement "of said clutch-spring means for moving said controlelement ".to cause disengagement of said clutch at theend of each :ofsaid phases thereof, means comprising a depressible' key for moving said:clutch control element to cause engagement ofsaidiclutch, meansincluding a second cyclic clutch between said motor and another of saiddevices, a second clutch control element movable to cause engagement anddisengagement of said second'clutch, mechanism controlled by said firstclutch :during a first one of said phases thereof for moving said secondcontrol element to cause engagement of said second clutch, a secondspring means. operable to move said second clutch control element tocausedisengagement of said second clutch at the end of each cyclethereof, meansnselectively settable into either of two conditions andoperable by said second clutch, said selectively settable means beingeffective in one of said conditions thereof to prevent operation ofsaidsecond spring means, said selectively settable means being settablein another of said conditions thereof to permit operation of said secondspring means and to move said first clutch control element to'causeengagement of said first mentioned clutch,;and means including a seconddepressibl'e key for moving said first mentioned clutch control elementto cause engagement of said firstclutch and for rendering said mechanismineffective and for preventing operation of said first mentioned springmeans upon the com: pletion of .a first phase of said first clutch.

ROBERT E. BOYDEN. EDWARD P. DRAKE.

(References on following page) 13 REFERENCES CITED The followingreferences are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,068,899 Anneren et a1 Jan. 26,1937 2,367,386 Crossman Jan. 16, 1945 14 Number Name Date 2,399,890 PottMay 7, 1946 2,419,760 Britten, Jr. Apr. 29, 1947 2,467,441 Noller et a1Apr. 19, 1949 OTHER REFERENCES Ser. No. 262,552, Kiel (A. P. C.)published May 25, 1943.

